build: sync libuv header change

PR-URL: nodejs#48429
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

deps/uv/uv.gyp

@@ -101,7 +101,6 @@
       'include/uv/bsd.h',
       'include/uv/aix.h',
       'src/unix/async.c',
-      'src/unix/atomic-ops.h',
       'src/unix/core.c',
       'src/unix/dl.c',
       'src/unix/fs.c',
@@ -115,7 +114,6 @@
       'src/unix/process.c',
       'src/unix/random-devurandom.c',
       'src/unix/signal.c',
-      'src/unix/spinlock.h',
       'src/unix/stream.c',
       'src/unix/tcp.c',
       'src/unix/thread.c',